A flexible supercapacitor based on bamboo shoot-like NiCo2Se4 hollow nanostructure

作者：Yang, Rui; Zhang, Yu; Huang, Xian; Yin, Huiqun; Mo, Yiyan; Zhang, Kaiyou^*; Qin, Aimiao; Chen, Shuoping; Dai, Shuge

来源：IONICS, 2023, 29(8): 3353-3363.

DOI：10.1007/s11581-023-05061-4

• NiCo2Se4
• Supercapacitor
• Hollow structure
• Kirkendall effect

The electrochemical performance of the electrode material for supercapacitor is influenced by several factors and could be facilitated by a particular morphology. A reasonable morphology can provide more active sites and larger specific surface area, and increase the ion transport rate. Herein, NiCo2Se4 with hollow nanobamboo shoot (NBS) structure is prepared by a two-step hydrothermal process and the formation of hollow structure is due to the Kirkendall effect. The NiCo2Se4 synthesized with optimal conditions achieves a high specific capacitance of 6.21 F cm(-2) at a current density of 1 mA cm(-2), and the cycling stability of NiCo2Se4 is as high as 76% after 5000 cycles at 20 mA cm(-2). The designed NiCo2Se4//AC supercapacitor can achieve an energy density of 24.9 Wh kg(-1) at a power density of 537.04 W kg(-1). All of the above demonstrate that NiCo2Se4 bamboo shoot-like structure has a promising application in supercapacitor.

• 单位
  郑州大学; 桂林理工大学